Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dac9e449f237ce3…

MALICIOUS

PDF

82.9 KB
MD5: 509e95a1bd7e37809cba9f697b1cd7c0 SHA-1: f6f0fc92714e84a9b7b9eb3fef2eeb2b2d0924f2 SHA-256: 8dac9e449f237ce3ac1698cc7a9feeff3d4921c74524083eff6de77ba531fab3
148 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious PDF T1566.002 Phishing: Spearphishing Attachment

The PDF file utilizes XFA (XML Forms Architecture) which is a known vector for embedding malicious scripts. ClamAV detections indicate the presence of an exploit targeting PDF vulnerabilities, likely leading to the execution of a secondary payload. The embedded script payload, although not directly readable, is a critical indicator of malicious intent. The URLs present are related to XFA specifications and do not appear to be directly malicious.

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000246.bin
5c704b47de9f113a8162da01213dc6cc132168e22f76d719611f5de029ddac6d		 pdf-embedded-script PDF raw stream script payload at offset 0x246 84199 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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